This lens is perfectly suited for Canon's EOS system cameras--placing special emphasis on its manual focusing capability--which have a wide rubber focusing ring that allows you to make easy adjustments. The ultrasonic motor (USM) and rear focusing design allow for silent, high-speed autofocus and full-time manual focus. Because of its full compatibility with 1.4x and 2x EF extenders, you have the option of added focusing versatility.

UV (Ultraviolet) Filter
A UV filter is used to reduce ultraviolet rays and produce crisp, clear photographs. UV filters are commonly used to help protect the surface of the lens from scratches, smudges, dirt and other hazards.

CPL (Circular Polarizer) Filter
A polarizer is different than most filters in that it is composed of two pieces of glass, mounted independently inside a round frame so that one can be rotated relative to the other. As it is rotated, it increasingly cuts out glare and haze. Polarizers reduce glare from water, glass, or any non-metallic surface. You can also use a polarizer filter to darken blue skies.

The Vivitar Design Lens Hood is designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. In addition, you also get the added benefit of extra protection from accidental impact.